1. (v. t.) To contend with; to oppose actively; to counteract.

2. (v. i.) To act in opposition.

aggravate alienate battle be antipathetic be inimical beat against beat up against breast the wave buck buffet buffet the waves clash close with collide combat compete with conflict conflict with confute contend against contest contradict contrapose contravene counter counteract counterattack counterpose countervail counterwork cross embitter envenom estrange exacerbate fight fight against go against go counter to grapple with heat up infuriate interfere with join battle with labor against lock horns madden meet head-on militate against offer resistance oppose oppugn provoke reluct reluctate resist rival run against run counter to set against set at odds stem the tide strive against struggle against swim upstream take on vie with work against